Can I track "Organic Reach" from my Facebook Ad?

No.

Wicked Reports cannot track the "Organic Reach" of your ads. When your Ad is "Shared" on Facebook, you are not paying for the actions that people take on you ad, for example a "click".

Because of this, Facebook does not include the "URL Parameters" values on the clicks that occur when your Ad is shared. Because the clicks do not have tracking on them, the clicks are not tracked in Wicked Reports.